nut

Concise Bible Dictionary:

Pistacia Vera
2. egoz. The bride “went down into the garden of nuts” (Song of Sol. 6:1111I went down into the garden of nuts to see the fruits of the valley, and to see whether the vine flourished, and the pomegranates budded. (Song of Solomon 6:11)). This word is considered to refer to the walnut tree (Juglans regia). Josephus and others speak of the walnut tree growing in Palestine.
Juglans Regia – Walnuts in their shells

Strong’s Dictionary of Hebrew Words:

Transliteration:
boten
Phonic:
bo’-ten
Meaning:
from 990; (only in plural) a pistachio-nut (from its form)
KJV Usage:
nut